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Heating & Air Conditioning

Carrier Infinity Air Flow

12 years ago

I have a brand new Carrier Infinity system.

- 4 Ton Performance Series 2 Stage Heat Pump (25HPA648A003)

- Infinity Series Variable Speed Air Handler (FE4ANF005T00)

When I go into the advanced menu / checkout and turn on the heat pump for high cooling, the system is reporting 1400 CFM air flow. The static pressure is good at 0.53.

Why is it reporting 1400 CFM? Installer says everything is set up for 4T but could not explain the reading being 1/2 ton low.

Comments (3)

ekk6pa
12 years ago
It might be running 350 cfm per ton to reduce humidity. You can set a desired humidity target in the advanced menus, too.
ryanhughes
12 years ago
Carrier's default is 350 cfm/ton on the FV4/FE4 fan coils. It is set up just fine, and should do a good job cooling and dehumidifying.
ryanhughes
12 years ago
So you are aware, the fan coil can be instructed to operate at a higher airflow setting if you want more airflow. I think it's a matter of the installer selecting the "comfort" (350 cfm/ton) or "efficiency" (400 cfm/ton) airflow setting.

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